There has been a nationwide rise in murders in Mexico, with government data suggesting that 2,234 people were killed in June 2017 - the deadliest month in Mexico in at least 20 years.

Security experts say that the rise is caused by the fight for territory between rival criminal cartels after the extradition to the US of the powerful former leader of the Sinaloa cartel, Joaquin "El Chapo" Guzmán.